The full article doesn't seem to be there (goes to the magazine site but it's a 404 error).

I agree that some of their explanations look hokey, and that PV vacuum is a crock but I ignored that. I know better

I am hoping to find a small enough IFR that it can't run so darn rich at cruise (15") but still have enough to the idle screws (8"). It will end up being a compromise, of course. Going all the way down to .041 TSR helped lean the cruise some but it also created a lean flat spot.

Then I can play with the air bleeds, IAB then MAB. Those are easy to change but I'm getting really tired of taking the bowls off!
Do you think .028 is small enough?